Machine for boring axle-holes in hubs



. (No Model.) 2 sneets- -sh-eer; 1.

W. R. WOOD & S. BARR.

MACHINE FOB BORING AXLE HOLES IN HUBS, 8w.

N0.-Z59,447 Patented June13, 1882.

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(No Model.) 2 Shets -Sheet 2.

\ W. R. WOOD & S. BARR.

MAGHINE FOR BORING. AXLE HOLES 'IN HUBS, &0. N0. 259,447. Patented June 13, 1882.

came STATES i ATENT Erica.

MACHINE FOR BORING AXLE-HOLES lN HUBS, 80C.

SPECIFICATION forming part of Letters Patent No. 259,447, dated June 13, 1882.

Application filed August 30 1881. (No model.)

To all whom it may concern:

Be it known that we, WILLIAM R. Wool) and SAMUEL BARR, citizens of the United States, and residing at Butler, in the countyof Scott and State of Iowa, have invented a new and useful machine for boring axle-holes in hubs and other borings requiring irregular and varying diameter, of which the following is a specification as applied to boxing and chambering wheel-hubs.

Our invention relates to machinery for boxing and chambering wheel-hubs, wherein the required form of the hole sought is obtained by the inherent form of the shaft employed, which passes through fixedly -centered but flexible bearin gs.

The object of the invention is to provide a direct means for boring a hole the l0ngitudinal lines of which may be convergent, divergent, convex, concave, or corrugated, owing to the shape of the form-rod used as a part of the shaft. In this instance we illustrate a hole the longitudinal lines of which represent to each other, first, a section parallel; second, a section concavo-convergent; lastly, a section increasingly convergent. The parallel walls of the hole are formed while the bearings are in line with the axis of the threaded feed-shaft around which at this point the bit performs its revolutions. The arch and slight taper in the mid-section are due to the curve in the formrod. The final increased taper is due to the deflected part of the form-rod gradually drawing the line of out inward by constantly-narrowing revolutions until the final circles of the bit are performed around the axis of the formrod, while the feed-shaft is now operating at a slight angle through its flexible bearing. To prevent binding of the form-rod as it passes its bearing, we find it sufficient in practice to somewhat flatten the deflected part, so that its oblique diameter will fill the countersunk guide or bearin g when the angle is presented.

Our invention further relates to a combination of devices designed and adapted to instantly grip and center the work also devices which allow ready means of introducing, operating, or withdrawing the shaft.

Figure l of the accompanying drawings represents a perspective view of our machine. Fig. 2 is a view of the operating-shaft in alongitndinal section of hub. Fig. 3 is a top view of one of the clutches, showing the devices for holding the feedshaft. Fig. 4 is an under view of the same, showing the mechanism for centering the clutch. Fig. 5 is across-section of the oflset-knuckle I.

Similar letters refer to similar parts throughout the several views.

A '5 is the operating-shaft. A is the threaded feed-shaft. i is the form-rod. Z is a rigid 01fset-knuckle, supplied with a cutting-bit, s. g is a set-screw to allow the adjustment of the bit to different sizes. E is a hand-crank for rotating the shaft, which may be replaced by any convenient power.

The inner lines of the section of hub a: m, Fig. 2, substantially represent the lines of cut when a form-rod of the given shape is used.

The further and prime use of the offset 1 is to lead the circle of bit on a deflection of the form-rod i from the axis of A to the axis of i at l. (SeeFig. 6, which is a cross-section of the ofl'set-knuckle l.)

The dotted line M around A represents the first circles of the bit 8 around the shaft A.

The dotted line N around i represents the final circle of bit 8 around the form-rod t at 1 after traversing the deflection of i,which throws N, with all the intermediate variations, concentric with M, the effect of which is seen in .70 00, Fig. 2.

If it is desired to box to the dotted lines o i), Fig. 2, it is only necessary to set the bit out the required depth and repeat the proper distanoe.

The open centered disk on is the frame-work of the clutch H, and may consist of a threearmed cross-tree bearing three pairs of jaws, an, and used for the purpose of holding in place the grip-pins P P and rim 0, hereinafter more fully described.

A section of the edge of the disk m is provided with cogs to be operated on by the lock k, attached to 0.

Fig. 3 illustrates the mechanism for holding the shaft A i centrally in the clutch and governing the feed, also allowing the necessary flexibility.

b b is a hinged collar, supplied with wooden followers 20 w, so arranged that they may be driven inward to compensate for wear, if found necessary, being cut with thread to fit the feedshaft A when closed around it, as seen in Fig. 1 ,and held by the link y centrally and securely against the post if under the guard u.

Fig. 3 also shows the open center of the disk m, allowing the ready introduction or withdrawal of the shaft A 'i when the collar b b is thrown open.

Fig. 4 is a View of the under side of clutch H, the use of which is to grip the hub centrally and securely. n n are jaws, being part of disk or cross-tree m, hereinbefore referred to.

O is a loose rim in place between the jaws n n, and having cut through it three several eccentric slots used to draw the square grippinsP P, which are provided with lips to fit the slots in the rim 0, and are moved radially and simultaneously across the rim and through the jaws n n, each alike bythe same pitch of the slots, as the rim is partly turned right or left by the handle 0. 7c of Fig. 3 is alock provided with a lever-handle, and having cogs, it being hung eccentrically that it may be thrown out of gear, the use of which is to the more securely tighten and lock the rim 0 by means of the cogs meshing and drawing on the cogs of a section of m. The clutch D is substantially the same as H in regard to the gripping movement.

\Vhat we claim as our invention, and desire -to secure by Letters Patent, is-

WILLIAM R. WOOD. SAMUEL BARR.

Witnesses:

JOHN E. DARRAH, M. L. HIRE. 

